In a 9"x 13" dish, spread bean dip until smooth. Then layer mashed avocados with lemon juice. Mix taco mix with mayonnaise and sour cream. Layer on top of avocados. Spread the two shredded cheeses on next. Chop tomatoes and green onion and spread next. Sprinkle chopped olives on top.
Make ahead and chill in fridge. Serve with tortilla chips.